YOU SAID:

i am going on an exchange program for 3 months next year

INTO JAPANESE

来年は3ヶ月間交換留学をします

BACK INTO ENGLISH

Next year, I will study abroad for 3 months

INTO JAPANESE

来年は3ヶ月留学します

BACK INTO ENGLISH

I will study abroad for 3 months next year

INTO JAPANESE

来年は3ヶ月留学します

BACK INTO ENGLISH

I will study abroad for 3 months next year